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Finding the Fourth Proportional to 96.22, 133.39 and 91.81

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Solution

The fourth proportional to 96.22, 133.39 and 91.81 is: 127.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.22 : 133.39 = 91.81 : x
  2. Step 2: Convert to fraction form
    96.22/133.39 = 91.81/x
  3. Step 3: Cross multiply
    96.22x = 133.39 × 91.81
  4. Step 4: Simplify right side
    96.22x = 12,246.54
  5. Step 5: Solve for x
    x = 12,246.54/96.22
  6. Step 6: Final answer
    x = 127.28

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.